Dredge-chain.



'No. 822,395. PATENTED JUNE 5, 1906.

v E. L. SMITH & 3. M. SHERRERD.

DRBDGE GRAIN.

APPLIGATIGE FILED FEE 7. 1905,

2 SHEETS-SHEET I 17 2 5 Wfiifianrar: 7 M f E a flclz rmrdi Na: 822,395. 'YKTENTBD JUNE 5,1906. 8. L. SMITH 8r J. M. SHERRERD.

DREDGE CHAIN.

APPLIGATIGN FILED JUNE 2. 1905.

2 SEEETB-BHEBT 2 on 11151) stares PATENT OFFIbl}.

EDWARD L. Skll'lll, ()l llltlttihlihltllltlhl. (,ULORAUO, AND JOHN M.

Slllfillllllltl). ()l EAS'IUN. PENNSYLVANIA.

DREDGE-CHAIN.

Specification of Letters Patent.

Patented June 5, 1906.

Application filorl June 115365. Serial No. 261,087.

To all] whrmt it may muuw-n:

Be it known that we, Enwmm ll. Snrrit, residing at Breckenridge, in the county of Summit and State of Colorado and drum M. Snsnannn, residing at Esston, in the county of Northam ton and Stateof Pennsylvania, citizens of t to United States, have invented certain new and useful Improvements in Drecl e-ChainsfoPV-hieh the following is a spool cation.

This invention has reference to the articulations of various chain devices, as racially to the dredge-chains provided with l iut'kets or scoops on the links of the chain, whichis formed continuous and operated as a conveyer for dredging, excavting, and similar pur oses. i

It is an object of the invention to provide improved means for preventing access of the dirt or other material operated upon to the members of the joints that are relntivel mbvable to prevent abrasion and undue friction at such places, and such means are especially applicable where the dredge is used' with wet material or for excavating the .ground at the bottom of a body of water.

' A further object of the invention is to pfQ.

video. form of covering means that will entirel'y close'the aperture made in the link members for the pivotal pin on the outer faces of the member. A

Another object of the invention is to provide an improved form of gasket or pecking ring that is placed between the opposing movable faces of two members that are artieulated.

In the drawings accompanying; and torus ing a part of this specification, Figure 1 shows .in perspective a dredge-chain with our improved inrm of closing device for the pi\fot apertures and also our improved form of gasket. -Fig. 2 shows elongitudinsl section, partly broken, throu it it link and a bucket Jointed therewith. h 1g3 shows it gasket and molosing ring in transverse broken section.

F ig. 9 shows a side elevation and 'jaeent stsntialiy of a concavely-taper be other side of the gasket will have a bearclosing the a Jerture for the pivot-pin. Fig. 8 is an end el a so an end view of the plate closing the opening for the' pivot-pin.

Referring now to the drawings, the link i2 has at one end a transverse bore 13 for the insertion of the beerin -pin 14 and at each of the opposite sides 0 the limit is arranged it boss 15, concentric with the aperture 13. The periphery of each boss is preferably made converging outward! and is shown of a curved form prefersb y made cuneavely' eonverging. The member of the chain articulated to this link, which may be shovel mern her 16, is shown as having the usual project lug parts 17 18 attheopposite sides of'one end. These parts have apertures 33 19 of a size to permit insertion of the pin or bolt -14, that pivots the members toiether.

From Figs. 2 and 5 it will e seen that the end ofeach boss engages a plane inner face of the less 17 or 18 and that no bosses are formed on these pioces.- V

Each boss will offset the link from the adieoe, inghich s ace is placed a. gasket. -ring 20. Shown separately in his gasket has its inner face or side V ending with the periphery of the boss 15. ence in the present instsncesuch inner face will be sub cont-our. face will asket enthe boss.

or pao i Fig. 3.) 2t preferably of a shape c'orres The outer portion of this'curve form substantially one side of the aging the base or larger portion 0 ing against the plane face of'the'piece 17 or 18, and therefore will be arran edsubstantially trans-verse to the axis of t e gasket, ss shown at 22 in Fig; 3.

The outer face or periphery of the asket contains e groove 23 an is substantial U- sha ,ed in section. The outer portion 6 the. pen hery ad'aeent the la'ne side 22"is preferalil exten ed outwar at 24,'for the reason that when the gasket is placed on the boss, as shown in Figs. 2 and 5, this portlon'of it will be bent inward, and hence react to press against the plane face of the piece 1701' 18. I It is found desirable to place a suitable olstnp in the grani e 23, which may consist of a wire or red 35, passed around the curve, and portions twisted ovation of the same arts, and 5 rec withthe os or secured, as indicated in Fifig. 4. Thisivitl have the ellect oi wedging t ie gasket in the substantially.angular space hetween the periphery ol the gasket. and-thc adjacent piece, ctl'e-tually prevei'iting thoadmission of dirt or sand to the bearing-surfaces. One of these hosses 15 is placed on eachside of the link 12, which extend outward, and a gasket is placed on each boss, being inrevcrscd position, as shown in in Figs!) is shown one etlcct of the abrasion of the bore 13 in the link 12 h the bolt 14. This will cause a change of the position of the link and piece 17 relativclv, and hence thehoss will engage a ditlerent portion of the plane face of the piece 17, and the same applies to the gasket 2t), that will obvious change its position relative to the pieces 17 or 18; but since the engagin" face of the piece 16, with the side of the 'gasltet 14, is a plane surface there will he no distortion of the "asket or any displacement ofit tending Lo 0 eet unequal wear and destructive results.

In Fig. ti is shown an arrangement similar to Fig. 2; but in this instance he side pieces 25 are provided with bosses 26 similar to the aforesaid bosses 15, that iroject inward from the inner face of each ot the. outer faces .27 of the link 28 are made to extend in a plane perpendicularly with the pivot-pin 14.

the pieces 25,.and

The bosses 26 are surrounded l undercut. therein preventing the outward y the same form of gasket '21, hut in this in-' stance reversed in position, with its plane face disposed inward, in engagement with the outer p me? face of the link. It will be at once seen that the circumstances are. substantially identical with the form shown in Fig. 2,

and ience the same advantageous results will accrue from such modified construction.

The ivotal pin or bolt. 14 extends substan: tially t lTOUf'll the a ertures in the. pieces 17 and 18, an one at east of these apertures tnust be uncovered for the insertion of the in therein. This lpin is frequently providid with a. rectaiwu rhead fithand acorrespond- 'ingly shapeir enlargement of the .aperture must. be. formed in' the piece 18 to provide a socket for such head. The aperture in the.

piece 17 for the other extremity of the pin may not as entirely through--that is, ma consist 0 a socket il preferred; but since such socket. n1 st be drilled frc'u the inner face it is prefer bleto form an aperture through the piece. At-each end ofthe pin is thereby formed a space where dirt or sand, and especially tine m'ud, can enter between the contacting surfaces and reach the hearing-surfaces of the joint. l Ve provide amemhernt oneorprefen section.

ably both of the outer extremities of such aporture. In the drawings this cover is shown as com iosed of a plate 3:, having its edges beveletl-thatis, dovetailed in transverse A corres iondingly-slm Htl channel orslot 31. is formed in the outer ace of each piece 17 and l8,whose opposite side walls are movemcntmt the plate'iil that is slid in such slot. 'lhe plate is formed of a width slighti greater than the head or extremity of the pin 14, and the slot is arranged to intersect the a )erture for the pin 14, so that the insertion oi the plate a sullicient distance will'entirely cover or close the o iening into the piece 16 and prevent the admission of foreign particles thereto The late 31 may be snitailv locked in such position and is prefcrahliy made with the beveled sides slightl conve ing or tapered, and the engaging walls of t 1,, slot are similarly formed, so that when t .e plate is inserted inthe slot and forced to proper )ositio'n it will be tightly wedged h tween t to side walls, and thereby retained in.

composition.

Having-thus described our invention, are

Claim- 1. In a. pivot'jointmn apertured member,

a second member,a pivot on the second member extending into'the apertured .part of the other member, one of the members having a boss around the ivot and extending into 'contact with the at or member, theboss hav ing its peri her-y concave] converging toward the ot er member, t e other member having its face 0 aged by such boss extending in a plane atri ht: an les to the pivot, and a-gasket surroun ing-said boss and having its inner boss-engaging surface concavely converging corresponding to the periphery of the .boss. 2. In a. pivot-joint, an ap'ertured member,

a second member, a pivot on the socondmemher'extending into the apertured part of the other member, one of the members having a boss around the pivot and extending into contact with the other member-L the other member having its face 0 ed y the boss extending in a planoat right angles to the pivot, and a gasket surrounding said boss: and having its periphery grooved, and a clamping member located 111 said gTUUVV'i portion of the gasket.

3. In a pivotsjoint, an apertured l'llt'tr' -w a second menihenapivoton the second herextending into the apertnrerl part oi {in other member, one of the tr tnbers havin w bOt-N around the pivot and extending tu u: contact with the other member, the hoss na'x rev surrounding said ing its per heiry converging toward the other member, the other member having its face engaged by the boss cart-ending in [1' plane at right sngiies to the pivot, a gasket mas and having its inner bose-engaginy surfs-cc converging oorrcspending to t e periphery of the boss, the gasket having its periphery grooved, and a clamping 'member locatcd'in said grooved o portion of the ssket.

4. The com ination with pivoted men bors having soonverging boss on one member ofi'setting the other member, of a r isnt ssket he ving one'si e face convex corres ond '-ing to the boss, the other si eisce sing, transverse tothe pivot from the 'inner edge,

- outward, but flared away from the" saved portion, at the outer part, and a c sni ing member located in the groove rctainin the gasket in position with the flared and snugly engaging t mom er.

' 5. Ln 8 pivot-joint, an apertured member,

portion ent e adjacent Y z 5 a second member, a'pivot on the second member extending into the apertured part of the other member, one of the'mcmbers hsving a. boss around the ivot and extending intocontact with thefot or member. the boss having its periphery converging toward the other boss-e member, the other member having'ite face engaged by such boss extending .ina plane at rig t angles to the pivot a resilient gasket surrounding said boss and having its inner aging surface converging correspvuding to t e periphery of the lmss, and a c a'mfp: ing member enga" the periphery of t e gasket at its interm 'ate portion only.

6. In a pivot-joint, an hpertnred member,

40 a. second member, a. pivot on the second memher extending into the spertured part of the other member, one of the members having a boss around the pivot and extending into -contact with the other member, the boss having its peri hery converging toward the other boss-e member, t e other member having its face epgaged by the boss cxtending'in a piano st mg 1; a lesto t pivot, a resihent gasket surroun mg said of the secon link by means of s pivot on one link extending into an a erturedportion of the other link, one of sucii links at each said joint having a boss around the pivot on one face and extending into contact with the other lini ,,thc other link at each said joint its periphery grooved, and;

es and having its inner? ,havin its face engaged hythc-hoss extending in s p one at right angles to the pivots gashot surrounding each such boss and having its periphery grooved, and a clamping memher coated 1n the grooved part of the gasket. 8. in a chain, a link having at one-end an sperturcd part projecting from esch side, a second link extending between said parts and having an aperture rc'gisteringwith said apertures, a pivot exten ing through said a pertnre'd parts thereby articulating the links, one of the links at each joint havinga boss around the ivot and extendin into contact with the ot er link, each boss aving'its pei'iplhery concavely converging toward the ot er lfiik and a. gasket sin-rounding each boss and having its-inner boss-engaging surfaces concavely converging corresponding to the periphery-of the boss.

9. In a chain, c. link having at one end a part projecting fromcsch side, a second extending between saidparts, each of said parts heinipivoted to ti'aed aoent portion -of the seed link extending into an aperturod portion of the other link, the second link at each side oint having a boss around the pivot on one other fink, tho-other at each said joint havingits face engaged by the boss extending in a piano at nghtangles to the pivot, a gasket surrounding, each'such boss and haw mg its periphery grooved, and a ciam ingt miiber located in thefgrooved part 0 the at.

it). In a; chain; a link havingat one end an apertlilfed Part projecting from each side, a second link extending between said parts and having on aperture registering with said epertures; a pivot exten mg through said aper tured parts thereby artlculating the links, the second link at each joint having a bosssround the !pivot and extendin into contact with the at or link, each boss aving its peri he concavely converging toward the o her "21k, and a. gasket surrounding each boss and having its inner boss-engaging surand a. gas ct surrounding each said boss an having its inner boss-engaging surface concsvfiiyconvergmg corresponding to the pelink by means of a pivot on one 7 .i'dce concavely converging corresponding to part projecting om concavely converging its face engaged b each said b'ess extending in a ions at rig t angles to the pivot pivot end portions, the said parts each hav-- mg a slot on the outer face intersecting such a icrture, and a plate secured in each such. sot and entirely covering the aperture at that end.

13. In a chain, a member having a trans-. verse aperture, a pivot m such aperture projrctin be 'ond each side, a second member artieu ater with such member by having two apertured parts, each engaging one of said pivot end portions, a slot in the outer face of each said part intersecting said aperture, the

opposite side walls of the slot being undercut,"

and a plate having inclined side faces and arrangm to lit into each said slot and thereby c entirely cover each said aperture.

14. in a chain, a member having a transverse aperture, a pivot in such aperture pro- -jecting be ond each side, a second member articulater with such member by havm two apertured parts, each engaging one 0' 'said pivot end portions, a slot in the outer face of each sa d part intersecting said aperture, the

opposite side walls of th'e slot being undercut,

and a plate having inclined sidefaces and arranged to litinto said slot and thereby entirely cofver each said aperture, each slot having the slde walls arranged converging, and

each plate having its inclined sides correspondingly converging, whereby the plate.

converging, whereby the plate can can be wedged in such slotted face of the plate. I

1.5. A member having an aperture, a rod or bolt extending into such aperture from one side of the member, and a plate slidably attached to theiother side of the memberand entirely covering such-aperture.

I 16. A member having an aperture, -a rod or bolt extending into such aperture from one side of the member, the member *havin a slot on the opposite face intersecting sue aperture, and a plate secured irrsuch sl0t.and' entirely covering the aperture.

17. Amember having an aperture, a rod or bolt extending into such aperture from oneside 0f the member, a slot in the, 0 posit face of the member intersectin sai aperture, the opposite sidewalls of t 0 slot being undercut, and a plate having inclin'ed side faces and arranged to fit into such slot and thereby entirely, cover such aperture.

18. A member having aniaprture, a rod or 'bolt extending into such aperture from one. side of the member, a sloItin the gppqsite face of the member intersecting said aperture, the opposite side Walls of the slot being un-- dercut, and 'aplate having inclined side faces. and arranged to fit into such slotand thereby entirely cover such aperture the slot havin the side walls arranged converging, and sai plate having-its inclined sides correslpcndingly e wedged in such slotted face of the member.

' EDWARD L. SMITH. A JOHN M. SHERRERD. Witncsscs:

E. B. Coss, F. T. CRAMER. 

